Automatic window lock



Nov. .22, 1938.

F. BERGHOFF 2,137,937

AUTOMATIC WINDOW LOCK Filed Jan. 25, 193-8 4 6 l /.3 M //7 9 I WITNE SSATTORNEYS Patented Nov. 22, 1938 AUTOMATIC WINDOW LOCK Frank Berghoff,La Fayette, Ind.

Application January 25, 1938, Serial No. 186,887

1 Claim.

This invention relates to automatic window locks and has for the primaryobject the provision of a device of this character which when properlymounted on a lower slidable sash of a window will coact with the upperslidable sash to secure the sashes from being opened and embodies aconstruction whereby the device may be held inoperative whenever it isdesired to open either of the sashes and will permit the sashes to beclosed without rendering said device inoperative.

With these and other objects in View, this invention consists in certainnovel features of construction, combination and arrangement of parts tobe hereinafter more fully described and claimed.

For a complete understanding of my invention, reference is to be had tothe following description and accompanying drawing, in which Figure 1 isa side elevation, partly in section, illustrating an automatic windowlock constructed in accordance with the present invention and showingthe same mounted on a lower sash and held in an inoperative position andprevented from coacting with the upper sash in securing the sashesagainst being opened.

Figure 2 is a sectional view showing the device coacting with the uppersash in preventing further opening of either sash.

Figure 3 is a front elevation illustrating the I device.

Figure 4 is a side elevation partly in section showing the securingroller of the device retained in an inoperative position.

Referring in detail to the drawing, the numeral I indicates a base platesecured on the upper rail of a lower sash 2 of a window and has integra1therewith upstanding arms 4. Integral with the base I and the arms 4 isa wedge plate 5 tapering towards its upper end. The arms 4 have formedtherein slots 6 each having an up wardly inclined branch I and ahorizontally disposed branch 8. The branches I substantially parallelthe front face of the wedge plate. A pintle 9 slides freely in the slotsand has secured thereon a yieldable roller l constructed of rubber orany other material suitable for the purpose. As long as the pintle 9occupies the branches l of the slots the roller has peripheral contactwith the upper sash ill of the window and the wedge plate so that shouldan attempt be made to raise the lower sash or lower the upper sashwedging of the roller between the wedge plate and the upper sash willtake place preventing movement of said sashes for the purpose of openingthe window.

vice.

A shoulder M is formed on the rib [2 to engage the lever for retainingthe pintle 9 in the branches 8 of the slots 6. The securing devicedescribed is rendered inoperative by the positioning of the pintle 9 inthe branches 8 of the slots 6 and retained in this position by the leverengaging the shoulder l4.

However, when the lever is disengaged from the shoulder M the pintle 9moves into the branches 1 of the slots and comes in contact withthe'upper sash and the wedge plate so that any attempt to open either ofsaid sashes will be prevented by the wedging action of the roller on theupper sash and the wedge plate.

A securing device of this character can be rendered operative in any ofthe positions that the sashes may be occupying to prevent furtheropening of said sashes.

What is claimed is:

An automatic window lock comprising parallel supporting arms, a baseconnecting said arms and adapted to be secured to a lower sash of awindow, a wedge plate carried by said arms and base, said arms havingslots and each slot including upwardly inclined and horizontallydisposed branches, a pintle operating in said slots, a yieldable rollercarried by the pintle to have contact with the wedge plate and an uppersash of the window to effect securing of said sashes against beingopened, a lever pivoted on said pintle for moving said pintle into thehorizontally disposed branches and thereby effect disengagement of theroller from the upper sash to free said sashes for opening, areinforcing rib between the wedge plate and the base and having a notchto be engaged by the lever for retaining of the slots.

disposed branches FRANK BERGHOFF.

